Magnetar’s Revised Filing Sheds New Light on Its Holdings

The hedge fund firm, employing a tactic commonly used by merger arbitrageurs and others, held off on disclosing some of its big positions in the third quarter — until now.

It is not unusual for hedge fund managers to delay disclosing certain positions in their quarterly 13F filings with the Securities and Exchange Commission that detail U.S. equity-related holdings. All they have to do is seek and receive a confidential waiver from the SEC allowing them to not publicly reveal certain holdings.

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